Adjustable reamer.



W. TURNEY. ADJUSTABLE BEAMER. APPLIoATIoN FILED Jmnzz. 1909.

Patented May 24, 1910.

Y ww Snwwwww bm WILLIAM TURNEY, 0F HYDE PARK, MASSACHUSETTS.

ADJUSTABLE REAMER.

Specification of Letters Patent.

Patented May 24.-, 1910.

Application led January 22, 1909. Serial No. 473,764.

To all whom it may concern.'

Be it known that I, WILLIAM TURNEY, of Hyde Park,in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Adjustable Reamers, of which the following 1s a specification.

This invention relates to adjustable reamers and has for its object to provide a reamer comprising a shank and a plurality of cutting members which are adapted to be moved toward or from theL axis of the shank and clamped thereon by means longitudinally movable on the shank. This may be accomplished in a variety of ways, of which several are illustrated upon the accompanying drawings and described in the following specification.

On the drawings, Figure 1 represents a side elevation of the cutting end of a shank provided with one form of cutting members and appropriate clamps therefor. Fig. 2 is a longitudinal section of the form shown by Fig. l. Fig. 3 is'a perspective view of the end of the shank. Fig. 4 is a perspective view of one of the cutting members. Fig 5 is an end elevation of the cutting end of the reamer. Fig. 6 is a cross section on line 6-6 of Fig. 2. Fig. 7 is across section on line 7-7 of Fig. 2. Fig. 8 is a longitudinal section of the cutting end of the reamer, provided with a modified form of clamping means. Fig. 9 is an end elevation thereof showing the. clamping bolt in section. Fig. 10 is a perspective View of the cutting end of a shank formed in accordance with that of Fig. 8. Fig. 11 is a longitudinal section of the cutting end of the shank vand another form of means for clamping the cutting members thereto. Fig. 12 is a pers ective view of the cutting end of a shank ormed with grooves for attaching the cuttin members. Fig. 13 is a cross section of the atter form of shank provided with cutting members and means for' attaching the same.

The same reference characters indicate the same parts wherever they occur.,

Referring first to Figs. 1 to 7, the cutting end of a shank is indicated at 15 and is formed vwith a portion 16 which is rec-v bearings for cutting members 18 which are formed with cutting edges 19 and with grooves 20 having inclined faces 21. The cutting members are adapted to be mountedupon opposite sides of the portion 16 so that they embrace the said portion in the grooves and so thatthe inclined faces 21 shall bear upon the correspondingly inclined faces 17. By means of this construction and arrangement, the cutting edges 19 are adapted to be moved toward or from the axis of the shank by a sliding movement of the cutting members u on their inclined bearings. The means for a justing and clamping the cutting members in the a oresaid figures, comprises a collar 22 internally threaded and constituting a nut engaging a threaded portion 23 on the shank. The collar constitutes not only one of a pair of clamping members but a gage by which the adjustment of the cutting members may be determined. The cutting members are adapted to abut against the collar 22 and to be clamped against the same by means of a washer 24 and a nut 25 screw-threaded upon a projecting portion 26 at the outer extremity of the portion 16.

By reason of this construction and arrange# ment, it will vbe seen that' movement of the cutters toward and from the axis of' the shank is eHected by longitudinal adjustment of the collar 22 and nut 25.

In Figs. 8, 9 and 10, the clamping means comprises instead of the nut 25 and screwthreaded extension 26 a screw-threaded socket 27 formed in the portion 16 and a bolt 28 inserted therein.

In Fig. 11 isv shown a construction byv which the cutting members may be clamped by pressure exerted upon them transversely of the axis `of the shank. In this form the clamping means at the end of the shank is omitted and the means substituted thereforv the longitudinal movement of the bolt 29 and corresponding adjustment of the cutting members.

For the purpose of lockin thel cutting members against radial disp acement, the portion 16 of the shank is provided with oppositely extending ribs or tongue 34 formed in pairs of which each pair is parallel to the intervening bearing face 17. The cutting members are provided with grooves 35 adapted to receive the ton es 34.

In Figs. 12 and 13 is il ustrated a shank and cutting members which afford a different arrangement of tongue and groove connection. In this form, the grooves are in the portion 16 and are indicated at 36. The cutting members are provided with tongues adapted to enter the grooves 36, said tongues in this form being composed of screws 37 inserted in screw-threaded sockets formed in said members. The grooves 36 are referably V-shaped in cross-section, an the tongues or screws 37 are therefore pointed as illustrated. The tongues in this form may be used not only for the purpose of preventing la'teral dis lacement of the cutting members but may turned so as to engage t-he walls of the .ooves tightly and so bind the cutting mem rs as to also prevent longitudinal movement thereof. As a further means of clamping the cutting members, the end of the shank may be provided with a screw-threaded extension 26 adapted to receive a nut by which the members may be clamped against an adjusting collar on the screw-threaded portion 23.

Having thus ex lained the nature of my said invention an described away of constructing and using the same, although without attempting to set forth all of the forms inwhich it may be made or all of the modes y plemental portions being equally inclined with relation to the axis of the shank, and means for securing the cutting members against movement in line with the grooves.

2. A reamer comprising a shank, a pair of cutting members each formed to embrace opposite s'ides of the shank, and complemental tongues and grooves connecting opposite portions of eacA cutting member wit-h opposite sides of the shank, said tongues being adjustable and adapted to bind in the grooves and prevent endwise and radial displace ment of the cutting members, and said grooves being equally convergent to the axis of the shank. f

3. A reamer comprising a shank formed with converging grooves on each of two opposite sides, a pair of cutting members each adapted to embrace twoop'posed grooved portions of the shank, and screw-threaded tongues oppositely disposed in the cutting members adapted to extend into the grooves so as to bind the cutting members on the shank.

In testimony whereof I have aflixed my signature, in presence of two witnesses.

WILLIAM TURNEY. Witnesses:

W. P. ABELL, P. W. PEzzE'r'rI. 

